Find the coordinates of every square

What is this about?

During WWII the German Navy used its own classified grid system to disguise, simplify and compress positions at sea.
The grid consisted of 536 large squares that covered almost all sea areas of the world. Today it is difficult to
convert these positions from war diaries and other documents into usable geographical coordinates.

This tool uses a completely different approach. There is no lookup table for squares and coordinates, but a complex
mathematical model to calculate the coordinates of all squares. There are indeed some coordinates stored within
the core library, especially for irregular quadrants, but this is kept to a minimum with the goal of calculating
as much as possible.

There are other services and tools, which convert grid squares; however they are limited to a subset of squares and
may be inaccurate.

What are the features?

This tool will convert all* grid squares to geographical coordinates. It can also reverse search and
retrieve the square for any given coordinate. The following details for each square are displayed:

Center coordinate for regular and irregular squares

Height, mean width, max width and min width

Type of square: regular, irregular (partial), irregular (polygonal)

Rendering of the requested square in Open Street Map

Furthermore you can download the displayed square as a KML file for Google Earth or Maps depicting the borders and
center coordinate.